Where does “cintilante” come from?

cintilante (Portuguese) comes from Portuguese cintilar, from Latin scintillāre, from Latin scintilla, from Proto-Indo-European ski-nto-, from Proto-Indo-European skey-, from Proto-Indo-European sek- — to cut, cut off, sever.

cintilante (Portuguese): scintillating, shiny, bright, brilliant

Definitions

scintillating, shiny, bright, brilliant

Ancestry of “cintilante”, step by step

Step	Language	Word	Meaning
1	Portuguese	cintilar	to scintillate; to sparkle; to shine
2	Latin	scintillāre	—
3	Latin	scintilla	spark; glimmer
4	Proto-Indo-European	ski-nto-	—
5	Proto-Indo-European	skey-	to split, to dissect
6	Proto-Indo-European	sek-	to cut, cut off, sever

Every word from Proto-Indo-European sek- →Every word from Proto-Indo-European skey- →Every word from Proto-Indo-European ski-nto- →